Corner shelf



FIG. 1 is a top plan view of my corner shelf;

FIG. 2 is a bottom plan view of FIG. 1;

FIG. 3 is a front side elevational view of FIG. 1;

FIG. 4 is a back side elevational view of FIG. 1; and,

FIG. 5 is a left side elevational view, the right side view being a mirror image thereof of FIG. 1.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a corner shelf, as shown and described. 